1STR

STREPTAVIDIN DIMERIZED BY DISULFIDE-BONDED PEPTIDE AC-CHPQNT-NH2 DIMER

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	B, D	STREPTAVIDIN	polymer	123	12965.0	2	UniProt (P22629) Pfam (PF01382) In PDB	Streptomyces avidinii
2	M, P	AC-CHPQNT-NH2	polymer	8	723.8	2
3		water	water		18.0	155	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	27377.7
All*	Total formula weight	27377.7

*Water molecules are not included.